Defn: Of or pertaining to ophthalmology.

OPHTHALMOLOGIST
Oph`thal*mol"o*gist, n.

Defn: One skilled in ophthalmology; an oculist.

OPHTHALMOLOGY
Oph`thal*mol"o*gy, n. Etym: [Gr. -logy: cf. F. ophthalmologie.]

Defn: The science which treats of the structure, functions, and diseases of the eye.

OPHTHALMOMETER
Oph`thal*mom"e*ter, n. Etym: [Gr. -meter.] (Physiol.)

Defn: An instrument devised by Helmholtz for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained.

OPHTHALMOSCOPE
Oph*thal"mo*scope, n. Etym: [From Gr. -scope.] (Physiol.)

Defn: An instrument for viewing the interior of the eye, particularly the retina. Light is thrown into the eye by a mirror (usually concave) and the interior is then examined with or without the aid of a lens. — Oph*thal`mo*scop"ic, a.

OPHTHALMOSCOPY
Oph`thal*mos"co*py, n. Etym: [Cf. F. ophthalmoscopie.]